What is Danquan Stone?

What is Danquan Stone? I believe many people are very strange to it, but if it is tanzanite, do you have any further interest in it, then what is the connection between Danquan Stone and Tanzanite, and Danquan Stone is What, then follow the small series to understand!

Tanzanite is also called tanzanite. It was originally designed to find precious stones in Tanzania. Later, it was not discovered, but it was discovered unexpectedly. After the promotion of Tiffiny, the gems gradually became famous. The reason why it will be called tanzanite is because the gems are like the twilight sky of Tanzania. The color is dark blue with purple and has strong pleochroism, but the hardness of the gem itself is 6.5 degrees Mohs hardness, and because of Tanzania. It has been in a civil war for a long time, so it is very poor, the mining of gems is not easy, the production is scarce, and the particles that are crystallized are not large, so in general, the chance of being able to buy more than 3 to 5 carats is not high. So the price is high.

Legend of Danquan Stone Origin

There is an ancient myth that burns when the sky thunder and lightning strikes the grasslands near Merelani Hill. Afterwards, the Masai herder and his livestock returned to the scene of the accident and found a mysterious and charming "blue gem" in the area. In 1960, the Portuguese geologist De Souza traveled to the above-mentioned grasslands, in today's Tanzania, to discover the beautiful and gorgeous blue gemstones in mythology, so he introduced it to the Tiffany Jewelry Company. Published and promoted. This beautiful blue gem was named Tanzanian Tanzanite because most of it was produced in Tanzania. The national standard for jewelry and jade in mainland China is "tanzan". The common colors of Danquan Stone are blue, purple blue and blue purple. Other colors of zoisite are brown, yellow-green, pink, etc., produced in: Tanzania and its borders, Kenya (the junction of the Mirrenyi Mountain), is also the only high-quality production area, color and fire intensity on Dan The value of spring stone has a great influence. A high quality Danquan stone has a good cut in cleanness, and it is pure blue under daylight (white light), while the jewel light (yellow light) has a distinct purple-red color. high quality.

Danquan stone production area distribution

Danquan Stone was first discovered in Tanzania. Yellow and green zoisites are distributed in Tanzania and Kenya. Manganese ochre is distributed in Norway, Austria, Western Australia, Italy and the United States.

Main source of Danquan stone

Place of origin

So far, the area around Arusha, Tanzania, is the only source of tanzanite. The Tanzanian Minister of Mines said that this is God's gift to the people of Tanzania.

In 1997, a Chinese self-employed merchant paid $60,000 to buy a top-ranking Tanzanian blue in the Tanzanian capital, setting the price at that time. At present, Tanshanglan sells well in the US market. With US President Clinton and his wife and daughter visiting Arusha, the origin of Tanzanian Blue in 2000 and 1998, the price of Tanshanglan in the US market has risen to resemble that of ruby. In fact, most of the Tanquan stone ore is brown, so it must be heat treated to change its color to blue-violet. This heat treatment can be considered as the standard optimization treatment of tanzanite. After heat treatment, the tanzanite is blue. With a purple hue.

Due to this karma, the price of tanzanite has also tripled in Tanzania. The market price of top-grade and A-class sang-blue is more than $300 per carat, the B-class is around $150, and the C-level is usually tens to $100. If it is a specially made exquisite variety, the price is not limited to this, we can see tens of thousands of dollars in a local jewelry store in the local jewelry store.

Danquan Stone difference

The pleochroism of Danquan stone is quite strong. When it is placed under the dichroic mirror, it will appear in three strong different colors: blue, purple and gray. The beauty of Danquan stone faceted gemstones has an absolute relationship with its pleochroism. From the front, the blue and purple ratios show subtle changes due to the slight difference in angles. This is why Danquan Stone is so popular.

Similar to the gems of purple blue sapphire and cordierite, we can distinguish them based on their apparent pleochroism and the refractive index and density of the other two. At present, synthetic gemstones with the same composition as natural tanzanite cannot be manufactured. As for artificial imitations, most of them are synthetic with synthetic spinel or synthetic corundum or other synthetic gemstones.

Through the introduction of the concept of Danquan Stone, the origin legend, the distribution of origin, the main producing areas and the difference between Danquanshi, I believe that friends now have a new understanding of what is Tanquan.

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